formats/registry.h

// Copyright 2026 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

#ifndef THIRD_PARTY_CREDENTIO_FORMATS_REGISTRY_H_
#define THIRD_PARTY_CREDENTIO_FORMATS_REGISTRY_H_

#include <memory>
#include <string>
#include <vector>

#include "absl/container/flat_hash_map.h"
#include "absl/status/statusor.h"
#include "absl/strings/string_view.h"
#include "formats/format.h"
#include "riegeli/bytes/reader.h"

namespace credentio {

class FormatRegistry {
 public:
  // Takes ownership of the format.
  void Register(std::unique_ptr<Format> format);

  absl::StatusOr<const Format*> GetFormat(absl::string_view media_type) const;

  absl::StatusOr<const Format*> GetFormat(riegeli::Reader& asset) const;

  absl::StatusOr<const Format*> GetFormat(absl::string_view media_type,
                                          riegeli::Reader& asset) const;

 private:
  // Formats.
  std::vector<std::unique_ptr<Format>> formats_;
  // Map from media type to format.
  absl::flat_hash_map<std::string, std::vector<const Format*>> format_for_type_;
};

}  // namespace credentio

#endif  // THIRD_PARTY_CREDENTIO_FORMATS_REGISTRY_H_